Vinod, The 802.11 standard specifies some basic requirements for multi-rate transmission, in order to maintain interoperability between various implementations. However, the actual algorithms used to select the transmit rate for a particular frame to a particular destination is entirely vendor specific.
What I have observed is that APs do not generally adjust their chosen transmit rate based on the behavior of a single station. Most APs seem to always start at the highest rate and then step down after some number of retransmissions of a single frame. The next time a frame is sent to that same destination, the AP starts at the highest rate, again. There does not seem to be much in the way of history kept in today's 802.11b APs. I have not seen enough 802.11a APs to say if they operate in the same way. -Bob -----Original Message----- From: Vinod [mailto:[EMAIL PROTECTED]] Sent: Wednesday, October 09, 2002 10:56 AM To: [EMAIL PROTECTED] Subject: [BAWUG] Auto TX rate adjustment question Hi all!!!!! I had some questions about the way an 802.11b AP works.Hope someone can help me out. Suppose there are 3 clients A,B & C.Now i have read that there is an auto TX rate adjustment in AP's when it senses packet loss. So if A and B are getting packet's fine,but C isn't, does the AP just adjust its rate for C or for all its clients? How does the TX rate adjustment actually work? Would appreciate some help. Thanks in advance, Vinod __________________________________________________ Do you Yahoo!? Faith Hill - Exclusive Performances, Videos & More http://faith.yahoo.com -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
